摘要
为了研究碳纳米管的掺量在硫酸盐侵蚀和冻融循环耦合作用后对混凝土试样腐蚀产物的影响,分别制备了碳纳米管掺量为0.05%、0.10%、0.15%的混凝土试样,并对混凝土试样进行了力学性能试验.通过TG-DSC热分析分别对龄期为28 d不同碳纳米管掺量的混凝土试样的水化产物以及不同耦合次数后混凝土试样、相同耦合次数后不同掺量混凝土试样的腐蚀产物进行了研究.试验结果表明:碳纳米管掺量为0.05%时,抗压强度提升最为明显;养护28 d时的碳纳米管混凝土的水化产物基本随碳纳米管的掺量的增加而逐渐增加;碳纳米管混凝土的腐蚀产物的含量随着耦合次数的增加逐渐增加;在相同耦合次数下,高掺量的碳纳米管混凝土试样的腐蚀产物要高于低掺量的碳纳米管混凝土试样。
In order to study the influence of the content of carbon nanotubes on the corrosion products of concrete samples after the coupling effect of sulfate attack and freeze-thaw cycle,the concrete samples with the content of 0.05%,0.10%and 0.15%were prepared respectively,and the mechanical properties of the concrete samples were tested.Through TG-DSC thermal analysis,the hydration products of concrete samples with different carbon nanotube contents at the age of 28 days,the corrosion products of concrete samples with different contents after different coupling times and the same coupling times were studied.The results showed that the compressive strength was improved most obviously when the content of carbon nanotubes was 0.05%.The hydration products of carbon nanotube concrete after curing for 28 days basically increased with the increase of the content of carbon nanotube.The content of corrosion products of carbon nanotubes increases with the increase of coupling times.Under the same coupling times,the corrosion products of the carbon nanotube concrete samples with high content were higher than those with low content.
作者
王峰
田威
WANG Feng;TIAN Wei(School of Civil Engineering,Chang′an University,Xi′an 710061,China)
出处
《混凝土》
CAS
北大核心
2020年第5期40-44,共5页
Concrete
基金
国家自然科学基金项目(51579013)
西安市建委城建专项资金支持项目(SJW2017-13)
中央高校资助项目(300102289303)。
关键词
碳纳米管
硫酸盐侵蚀
冻融循环
热分析
carbon nanotubes
sulfate erosion
freeze-thaw cycle
thermal analysis
